一种低电压应力的三电平PFC电路研究  

Research on a three-level PFC circuit with low voltage stress

作　　者：袁建华[1] 苏超[1] 卢云 Yuan Jianhua;Su Chao;Lu Yun(School of Electrical and New Energy,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《电子技术应用》2025年第1期118-123,共6页Application of Electronic Technique

基　　金：湖北省自然科学基金青年项目(2020CFB248)。

摘　　要：三电平及多电平电路具有更小的直流侧电压脉动和降低电路损耗的优点,并且能使直流侧电流波形更接近正弦化,因此提出一种基于四开关三电平PFC电路。利用四个开关管进行组合,使其具有多向开关功能,不仅能将输出电压抬升至三电平,降低开关管电压应力,还能为电感充电提供回路。同时该电路在每个模态最多两个开关管开通并共用一个脉冲信号,一定意义上简化了控制复杂度。最后,通过搭建一个额定功率为800 W的实验平台,验证理论分析正确性。Three-level and multilevel circuits have the advantages of smaller DC voltage pulsation and reduced circuit loss,and can make DC current waveform closer to sinusoidal,so a four-switch three-level PFC circuit is proposed in this paper.In this pa‐per,four switching tubes are combined to make it have multidirectional switching function,which can not only raise the output voltage to three levels,reduce the voltage stress of switching tubes,but also provide a circuit for inductive charging.At the same time,the circuit can open up to two switches in each mode and share a pulse signal,which simplifies the control complexity in a certain sense.Finally,an experimental platform with rated power of 800 W is built to verify the correctness of the theoretical analysis.

关 键 词：多电平技术 功率因数调制 双闭环控制 多载波调制 

分 类 号：TM46[电气工程—电器]